Material Selection And Current-carrying Matching Of Copper Terminal Blocks Under Specific Operating Conditions

In power distribution systems, copper terminal block is responsible for current distribution and equipment connection. Different application scenarios have significantly different requirements for conductivity and mechanical strength. The copper distribution block inside the industrial control cabinet needs to withstand frequent wiring operations, while the outdoor distribution box faces drastic temperature changes and humidity corrosion. T2 copper, due to its 99.9% purity and excellent conductivity, has become the standard configuration for high-reliability applications. The cross-sectional area of the copper terminal strip must be calculated based on the actual load current. When the continuous operating current reaches 100A, it is recommended to select a copper busbar specification of not less than 25mm².